Click event should be fired before change events for checkbox and radio button.

Source/core/html/HTMLInputElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 77 matching lines @@
     // Returns true if the type is button, reset, or submit.
     bool isTextButton() const;
     // Returns true if the type is email, number, password, search, tel, text,
     // or url.
     bool isTextField() const;
 
     bool isImage() const;
 
     bool checked() const { return m_isChecked; }
     void setChecked(bool, TextFieldEventBehavior = DispatchNoEvent);
+    void dispatchChangeEventIfNeeded();
 
     // 'indeterminate' is a state independent of the checked state that causes the control to draw in a way that hides the actual state.
     bool indeterminate() const { return m_isIndeterminate; }
     void setIndeterminate(bool);
     // shouldAppearChecked is used by the rendering tree/CSS while checked() is used by JS to determine checked state
     bool shouldAppearChecked() const;
     virtual bool shouldAppearIndeterminate() const override;
 
     int size() const;
     bool sizeShouldIncludeDecoration(int& preferredSize) const;
@@ skipping 277 matching lines @@
     // The ImageLoader must be owned by this element because the loader code assumes
     // that it lives as long as its owning element lives. If we move the loader into
     // the ImageInput object we may delete the loader while this element lives on.
     OwnPtrWillBeMember<HTMLImageLoader> m_imageLoader;
     OwnPtrWillBeMember<ListAttributeTargetObserver> m_listAttributeTargetObserver;
 };
 
 } // namespace blink
 
 #endif // HTMLInputElement_h